Combination lock



May 13 1924. l 451-193.957

s. BRozOwsKl COMBINATION LOCK Filed Hay 31. 1922 Patented May i3, i924.

STEVEN BROZOWSKI, OF NOKOMIS, ILLINOS.

COMBINATION LOCK.

Application led May 31,

To ZZ whom it mog/ concern.'

Be it known that I, STEVEN Bnozowsnr, a citizen of Poland.l residing at Nokomis. in the county of h/lontgomery and State of Illinois, have invented certain new and useful mprovements in Combination. Locks. of which the following is a specification.

This invention relates to a novel form of combination lock which operates through the shifting of a loose block from a recess in one element to a recess in another, and it is here shown as embodied in a doorlock and the block shifted by means of a suitable knob.

The invention has for a general. object to provide a novel `form of combination lock of the type above set forth. n

For further comprehension of the invention, and of the Objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Fig. l is a face view showing the inveir tion embodied in a door-lock, and applied to a door.

Fig. 2 is an enlarged transverse vertical section taken on the line 2-2 of Fig. 1.

Fig. 3 is an enlarged horizontal section taken on the line of Fig. l.

Fig. 4 is a perspective view of the slotted sleeve shown in Fig. 2.

' 1n the embodiment of the invention here shown the lock comprises a rectangular body 25 located in a suitable mortice 26 in the door 27, having one face Hush with the door and being of less thickness than the latter to leave a space for the bolt, a pair of face plates 28 and 29 being secured upon opy posite faces of the door.

The bolt is indicated at 30 and lies -Hat against the body 25 and is formed toward its rear end with a longitudinal slot 31 through which a fixed pin 32 extends. This bolt has fixed thereto a knob 33 whose shank 34 projects through a longitudinal slot 35 in the face plate 28. The bolt is formed with a tip 37 engaging in a keeper 38 in the door frame 39.

The rear portion of the bolt 30 is cnt out to accommodate a plate 42 also hinged to the stud 32 and having fixed thereto a knob 43 whose shank 44 projects through an arcuate slot 45 in the face plate 28. Formed in the contacting faces of the plate 42 and 1922. serial No. 564,736.

bolty 30 are complementary recesses 46 and 47 respectively in the latter of which a block 48 rests normally and prevents retraction of the bolt by engaging the stud 32, a spring 49 urging the block into the said recess 47 To move the block from the recess 47 to the recess 46 l provide a lever() fulcrumed at one end as at 51 in the mortice 26 in the door and having an outturned linger 52 at its opposite end which projects through an opening 53 in the bolt into engaging relation with the block 48, the part 25 being .cut out as at 54 to accommodate the lever.

The lever is normally urged in a direction to liftthe block 48 out of the recess 47 by a spring 55 coiled around its fulcrum pin 51, this spring being strong enough to overcome spring 49. f

The lever 50 is normally held with its `'linger 52 drawn back from the block 48,

the latter being in the recess 47 in bolt 30, by a plunger 58 slidable in a sleeve 59 fixed to the face plate `28 and having its inner end. adapted to bear on the lever, the outer end of the plunger projecting through the face plate 28 and having a head thereon 60. ln the wall of the sleeve 59 three longitudinally extending slots of different lengths are formed that are interconnected by the transverse slot 62, the middle slot, as designated by the numeral 63, being of greater length than the two laterally positioned Outer slots, while the plunger 58 carries a. small pin 64 that projects into the longitudinally extending slots and is shifted from one to another through the transverse Slot 62. Only the middle slot 63 is of sufficient length to permit of the plunger 58 moving out sufficiently, when the pin 64 engages therewith, to allow the lever 50 to lift the block 48 from the recess 47. It will be apparent that the positioning of the small pin 64 within the middle slot 63 will allow the plunger 58 to project outwardly of the face plate 28 a greater distance than when the said pin is positioned at any other point within the various slots, thus indicating when the block 48 is removed from the recess 47. lf preferred, an indicating mark, not shown, may be placed upon the plunger 58 `at such a point that it will only be visible when the small pin 64 is positioned within the slot 63 to allow the plunger to project outwardly of the face plate to such an extent as to disclose the said mark.

The lock thus constructed Operates as folthe bolt 30, the knob 38 being then grasped and the boltA retracted.

Having thus described my invention what l claim as new and desire to protect by Letters Patent ot the United States is as follows:

l. A lock comprising a bolt, a body portion along which said bolt is adapted to' slide, a stud fixed to said body portion and passing through a longitudinal slot in said bolt, a block normally closing said slot and adapted by engagement with said stud to prevent retraction of said bolt, and means for moving said block out of engaging position with respect to said stud, said means including a lever adapted to engage said block and litt it from said recess and a plate having a complementary recess adapted to receive said block, said plate being pivoted to said stud.

2. A lock comprising a bolt having a recess, a body portion along which said bolt is adapted to slide, a stud fixed to said body portion and passing through a longitudinal slot in said bolt, a block adapted to engage in said recess and close said slot, a plate hinged to the said stud and having a recess therein complementary to the recess in the said bolt, a spring actuated lever adapted to lift said block out of the recess in the bolt into the recess in the plate, a plunger normally holding said lever out ot engagement with said block.

3. lock comprising a bolt having a recess, a bodv portion along which said bolt is adapted to slide, a stud lined to said body portion and passing through a longitudinal slot in said bolt, a block adapted to engage in said recess and close said slot, a plate hinged to the said stud and having a recess therein complementary to the recess in the said bolt, a spring actuated lever adapted to litt said block out of the recess in the bolt into the recess in the plate, a plunger normally holding said lever out of engagement with said block, a sleeve surrounding said plunger and formed with a transverse slot and a series of communicating longitudinal slots of diierent lengths and a pin fixed to said plunger and engaging in the said transverse slot.

ln testimony whereof I have atiircd my signature.

STEVE BROZOl/VSKL 

